Simulation of VoIP Over UDP With Bandwidth on Demand Analysis

This paper analyses resource provisioning for enterprise Voice-over-IP (VoIP) networks. Simulation and analytical methods are used to enhance the provisioning process, which ultimately aims to provide the Bandwidth and its availability. This paper defines simple guidelines for network dimensioning in a multimedia environment in terms of end-to-end delay for the voice traffic, and in terms of throughput and packet loss for TCP data traffic. A realistic environment is modelled and simulated using ns-2. The model consists of a prioritized network in which intermediate routers perform priority scheduling to provide differentiation of Internet services.